Question

упростите выражение 4/9 2.7x-2 1/4y 4.2 5/7x-0.5y

Answer 1

4/9(2,7x-2.1/4)-4,2(5/7x-0,5y)=1.2х-2.1/9-3х+2.1у = 2.1у-1.8х-2.1/9